/*!
* jQuery imagesLoaded plugin v2.1.1
* http://github.com/desandro/imagesloaded
*
* MIT License. by Paul Irish et al.
*/

/*jshint curly: true, eqeqeq: true, noempty: true, strict: true, undef: true, browser: true */
/*global jQuery: false */

;(function($, undefined) {
'use strict';

// blank image data-uri bypasses webkit log warning (thx doug jones)
var BLANK = '';

$.fn.imagesLoaded = function( callback ) {
var $this = this,
deferred = $.isFunction($.Deferred) ? $.Deferred() : 0,
hasNotify = $.isFunction(deferred.notify),
$images = $this.find('img').add( $this.filter('img') ),
loaded = [],
proper = [],
broken = [];

// Register deferred callbacks
if ($.isPlainObject(callback)) {
$.each(callback, function (key, value) {
if (key === 'callback') {
callback = value;
} else if (deferred) {
deferred[key](value);
}
});
}

function doneLoading() {
var $proper = $(proper),
$broken = $(broken);

if ( deferred ) {
if ( broken.length ) {
deferred.reject( $images, $proper, $broken );
} else {
deferred.resolve( $images );
}
}

if ( $.isFunction( callback ) ) {
callback.call( $this, $images, $proper, $broken );
}
}

function imgLoadedHandler( event ) {
imgLoaded( event.target, event.type === 'error' );
}

function imgLoaded( img, isBroken ) {
// don't proceed if BLANK image, or image is already loaded
if ( img.src === BLANK || $.inArray( img, loaded ) !== -1 ) {
return;
}

// store element in loaded images array
loaded.push( img );

// keep track of broken and properly loaded images
if ( isBroken ) {
broken.push( img );
} else {
proper.push( img );
}

// cache image and its state for future calls
$.data( img, 'imagesLoaded', { isBroken: isBroken, src: img.src } );

// trigger deferred progress method if present
if ( hasNotify ) {
deferred.notifyWith( $(img), [ isBroken, $images, $(proper), $(broken) ] );
}

// call doneLoading and clean listeners if all images are loaded
if ( $images.length === loaded.length ) {
setTimeout( doneLoading );
$images.unbind( '.imagesLoaded', imgLoadedHandler );
}
}

// if no images, trigger immediately
if ( !$images.length ) {
doneLoading();
} else {
$images.bind( 'load.imagesLoaded error.imagesLoaded', imgLoadedHandler )
.each( function( i, el ) {
var src = el.src;

// find out if this image has been already checked for status
// if it was, and src has not changed, call imgLoaded on it
var cached = $.data( el, 'imagesLoaded' );
if ( cached && cached.src === src ) {
imgLoaded( el, cached.isBroken );
return;
}

// if complete is true and browser supports natural sizes, try
// to check for image status manually
if ( el.complete && el.naturalWidth !== undefined ) {
imgLoaded( el, el.naturalWidth === 0 || el.naturalHeight === 0 );
return;
}

// cached images don't fire load sometimes, so we reset src, but only when
// dealing with IE, or image is complete (loaded) and failed manual check
// webkit hack from http://groups.google.com/group/jquery-dev/browse_thread/thread/eee6ab7b2da50e1f
if ( el.readyState || el.complete ) {
el.src = BLANK;
el.src = src;
}
});
}

return deferred ? deferred.promise( $this ) : $this;
};

})(jQuery);